Reinforced concrete structure.



'G. M. GRAHAM.

REINFORUED CONCRETE STRUGTURE.

APPLICATION FILED MAR. 9, 1908.

Patented Apr. 27, 1909.

' 3 SHEETS-SHEET 1.

G. M. GRAHAM.

REINFORCED CONCRETE STRUCTURE.

APPLICATION FILED M AR 9,1908.

IMP/T0130? w 2 T w m 7 m. 2 L l T m H A w d 3 6 b n m a P 4m N 0 4 1 7 9 l 9 unrr STATES PATENT orrron.

GEORGE M. GRAHAM, or cardiac, ILLINOIS, ASSIGNOR TO .e. A. EDWARD KOHLER, or

' CHICAGO, ILLINOIS.

REINFORCED CONCRETE STRUCTURE.

Specification of Letters Patent.

Patented A ril 27, 1909.

Application filed March 9, 1908. Serial No. 419,856.

To all whom it may concern:

Be it known that I, GEORGE M. GRAHAM, a citizen of the United States of America, and

a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Reinforced Concrete Structures, of whi'chflthe followingmass which forms the body portion of the walls, floors, etc., of the structure.

And the present invention has for its object to provide a simple and'economical structural arrangement and combination of the skeleton reinforcing frame part-s whereby strength is imparted to the frame. members to resist lateral stress and deflection due to the tension of the skeleton reinforcing center, and the weight of the concrete masscarried in turn by said center, all as Will hereinaftermore fully appear. i

In the accompanying drawings :.Figure 1, is a detail vertical section of the side walls and fioor of a building, with the present improvement applied. Fig; 2, is a'detailflperspective view of a corner portion of the reinforcing frame. Fig. 3, is a detail vertical section of the same. Fig. 4, is a detail-vertical section of a modification. Big, ,5, is a plan view of the skeleton reinforcingjframe ofa building unit, before the skeleton wire or rod center is applied thereto.

Similar numerals of reference indicate like parts in theseveral views.

Referring to the drawings, 1 represents a series of four columns, constituting the supportfor a building unit, and to which are secured a series .of four horizontal girders 2, in manner hereinafter more particularly described, to constitute the rectangular border frame of such unit. And around which border frame windings 3 of wire in crossed relation are placed under tension to constitute the skeleton reinforcing center of such building unit, as set forth iudelail in my prior patent No. 865490 of September 10, 1907.

' 4 are angle coupling pieces" scouring the series of girders 2 to the series of columns 1 in manner set forth in detail in my companion application .for patent Serial Number 419,857 filed March 1908.

With the describedtype of skeleton reinforcing frame units excessive size and weight in the girders were required to impart suilicient lateral rigidity to resist the excessive lateral strain of the aforesaid windings under tension, as well as the weight of the concrete mass applied to the skeleton center formed by such windings. 1

With a view to provide a small, light and economical girder adapted to effectively resist the lateral stress above mentioned,-the present invention involves a construction as follows: 5 are ranged in space relation and provided at their inner ends with curved shoes 6, having bearing upon the curved sides of the girders 2,

and capable of longitudinal sliding adjust ments thereon for the purpose hereinafter set forth. At their other ends said struts are provided with bearing shoes 7 u on which tension members, now to be descri ed, have bearin to form in connection with said struts, lateral trusses for the series of four girders comprising one of the building units above referred to. 8 are multiple wires or rods constituting the tension members of the truss above referred to. Such wires or rods have bearing upon the shoes 7 of the truss struts 5 and are in parallel relation to the girders, portions of said wires or rods n'ally from the shoes 7 to the corner columns 1, and are secured thereto in any suitable manner, preferably by being wrapped around the same.

. In the resent invention, the multiple wires or ro s forming the tension truss members forthc four girders of the aforesaid buildwhile the end. extend diagoing unit, are formed by a continuous wire or rod rove over the entire series of bearing shoes 7, and around the series of columns 1, with the respective ends of such wires or rods secured together, or to a fixed part of the structure in any usual manner. Such manner of forming the tension members affords a very economical construction, the unsightli- .ness of which is hidden from view by the mass of.concrotc in .wl'iich it is embedi'led. in practice the windings forming such tension members are loosely and evenly applied after which the desired degree of tension in said members is readily attained by driving the struts 5 toward the ends of the girders.

structures, the combinzition of :1 series of four columns constituting the corners of build. ing unit, a series of four girders secured thercto, a series of four trusses for said girders comprising lateral struts having bearins against said girders and projecting toward the center of the building unit and a series of tension members secured tothe columns and having bearing on the outer ends of said struts, said tension members being continuone around the frame, and winrv inr sof wires ween opposed c, ders to con- I rte skeleton center of the building;

In. reinforcing frame for concrete structures, the combination of a series of four columns constituting the corners of a b" ilding unit, a series of four girders secured thereto, a series of four ti asses for said girders comprising; lateral struts having; bearing said girders and projecting toward the center of the building); unit and a multiple series of wires or rods secured to the columns and having bearing on the outer ends of said struts, said series of wires or rods being continuous around the frame, and windings of wire around and between oppdsed girders to constitute the skeleton center of the building unit.

3. In it reinforcing frame for concrete structures, the G()Il'1l)lllttl()ll of a series of four columns constituting the corners of a building unit, u series of four girders secured thereto, it series of four trusses for said girders comprising lateral struts having bearing; against said girders in a longitudi- 'nslly adjustable manner and projecting toward the center of the building unit and a series of tension members sezured to the columns and having bearing on the outer ends of said struts said tension members being continuous around the frame, and windings of wire around and between opposed girders to constitute the skeleton center of the building unit;

4. In a reinforcing" frame for concrete structures, the combination of a series of four columns constituting the corners of a building unit, a series of four girders secured thereto, a series of four trusses for said girders comprising leterel struts having bearing against said girders in a longitudinally adjustublc manner and projecting toward the stitute center of the building unit and a multiple series of wires or rods secured to the columns on d having bearing on the outer ends of said struts, said series of wires or rods being continuous around the frame, andv windings of wireeround and between opposed girders to constitute the skeleton center of the building unit. I

5. In it reinfor ring, ireme for concrete structures, the combination of a series of four columns constituting the corners of a build ins; unit, a series of four girders secured thereto, a series of four trusses for said girders comprising lateral struts having bearing against said girders and projecting toward so the center of the building unit and a series of tension members wound around the columns and having bearing on the outer ends of said struts, said tension members being continuous around the frame, and windings of wires around and between opposed girders to conthe skeleton center of the building unit. I

6. In a reinforcing frame for concrete structures, the combination of a series of four columns constituting the corners 0f a'buildingunit, a series of four girders secured thereto, a series of four trusses for said girders comprising lateral struts having bearing against said girders and projecting toward 05 the center of the building unit and a multiple series of wires or rods wound around the columns and having bearing on the outer ends of said struts, said series of wires or rods being continuous around the frame, and windings of wires around and between opposed girders to constitute the skeleton center of the building unit. 7,

7. In a reinforcing frame for concrete structures, the combiniition of a series of four 1 05 columns constituting; the corners of a buildmg unit, a scrles'of four girders secured thereto, or series of four trusses for said girders comprising lateral struts having bearing against sald girders in a longitudinally adjusteble manner and projecting toward the center of the building; unit and a series of tension members wound around the columns and l'iavingg; bearing on the outer ends of said struts, sztid tension members being, continuous uround the frame, and windings of wire around and between opposed girders to constitute the skeleton center of the building, unit.

8. in a reinforcing frame for concrete 12o structures, the combination of a series of four columns constituting the corners of a build ing unit, a series of four girders securedthercto, a series of four trusses for said girders comprising lateral struts having bearing against said girders in a longitudinally adustable manner and pro ecting toward the center of the building unit and a multiple scr1es of wires or rods wound around the columns and having bearing on the outer ends of said struts, said series of wires or rods being continuous around the frame, and windings of wire around and between opposed girders to. constitute the skeleton center of the building unit.

9. In a reinforcing frame for concrete structures, the combination'of end columns, a girder extending between the same, and a truss for said girder comprising lateral struts having bearing against said girder and provided with shoes on the outer'ends of the struts and having convex bearing faces and marginal flanges extending outwardly away from the struts and in the same direction in which the bearing surface is convexed, and a multiple series of wires orrods secured to the columns and having bearing on the outer ends of said struts.

10. In a reinforcing frame for concrete structures, the'combination of end columns, a girder extending between the same, and a truss for said girder comprising lateral struts having bearing against said girder in a longitudinally adjustable manner. and provided with shoes on the outer ends of the struts and having convex bearing faces and marginal flanges extending outwardly away from the struts and in the same direction in which the bearing surface is convexed, and a multiple series of wires or rods secured to the columns and having bearing on the outer ends of said struts. y

11. In a reinforcing frame for concrete having bearing against said girder and provided with shoes on the outer ends of the struts and having convex hearing faces and marginal flanges extending outwardly away from the struts and in the same direction in which the bearing surface is convexed, and a multiple series of wires or rods wound around the columns and having bearing on the outer ends of said struts. i

12. In a reinforcing frame for concrete structures, the combination of end columns, ajgirder extending between the same, and a truss for said girder comprising lateral struts having bearing againstsaid girder in a longitudinally adjustable manner and provided with shoes on the outer ends of the struts and having convex bearing faces and marginal flanges extending outwardly away from the struts and in the same direction in which the bearing surface is convexed and a multiple series of wires or rods wound around the columns and having bearing on the outer ends of said struts.

Signed at Chicago, Illinois this 29th day of February 1908.

GEORGE M. GRAHAM. 

